Agent skill · software engineering · charleswiltgen
axiom-watchos
Use when building ANY watchOS app — app structure, independent apps, Watch Connectivity, Smart Stack widgets, complications, controls, RelevanceKit, background tasks, ClockKit migration.
Why this skill is useful
Adds detailed guidance on watchOS app development, including app structure, connectivity, and background tasks that are not commonly found in public documentation.
What it needs
Requires xcode installed locally. About 3k tokens when loaded. Last updated 2026-08-06. 1,103 stars on the source repository.
What this skill does
watchOS Development You MUST use this skill for ANY watchOS-specific development including app structure, independent apps, Watch Connectivity, complications and Smart Stack widgets, controls, Live Activities on watch, background tasks, and ClockKit migration. <!-- AXIOMAUDITORINLINEBEGIN — rewritten for Codex by scripts/build-codex.ts; do not hand-edit --> Auditors are skills here. Where this router says "Launch some-auditor agent", invoke the matching Codex skill instead — same procedure, no Claude Code agent required. Available: axiom-modernize. The ones that shell out — builds, tests, simulators, crash symbolication — need shell access to run. <!-- AXIOMAUDITORINLINEEND --> Quick Reference Symptom / Task Reference ---------------- ----------- App structure, independent apps, watchOS 26 submission requirements See skills/platform-basics.md watchOS HIG, glanceable UX, navigation model See skills/design-for-watchos.md Smart Stack widgets, complications, ClockKit→WidgetKit, RelevanceKit See skills/smart-stack-and-complications.md Controls on watch surfaces, Live Activities on watch See skills/controls-and-live-activities.md Watch Connectivity (WCSession), paired-device data transfer, Family Setup See skills/watch-connectivity.md Xcode won't install/launch/attach to a Watch; Watch missing or unavailable in Device Hub / devicectl See skills/watch-device-diag.md Background tasks, freshness scheduling, TN3135 networking limits See skills/background-and-networking.md BGTaskScheduler migration, deprecated WK background scheduling OS27 See skills/background-and-networking.md Foundation Models / Private Cloud Compute on the watch OS27 See skills/platform-basics.md WatchKit→SwiftUI migration, ClockKit→WidgetKit migration See skills/modernization.md Cross-Suite Routes These topics overlap with watchOS development but live in separate suites: SwiftUI (shared iOS/watchOS/macOS) View state, data flow, @Observable → See axiom-swiftui Navigation basics (NavigationStack) → See axio …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills charleswiltgen/axiom-watchos--38a8b0